基于遥感和GIS技术的四川省猪苓适宜性分布范围研究

猪苓是我国重要的中医药材,具有很高的药用价值。对猪苓的适宜分布区域进行研究,为确定其种植产区及合理规划生产布局提供科学依据。基于TM,ETM+影像、DEM数据,提取林地、海拔高程、坡度、坡向、气温、降水、土壤等影响猪苓生长发育的关键生态因子,利用GIS技术对四川省猪苓的生态适宜性进行分析,并结合野外实测数据进行验证。结果表明:四川省猪苓资源适宜性分布面积为276.214 4 km~2,主要分布在平武县、北川县、理县、盐源县、西昌市、德昌县、盐边县、米易县、会东县、攀枝花市等县市,适宜性分布面积占该区面积的0.143 3%;根据相关文献资料与野外实地调研,通过GIS技术分析所得结果与猪苓资源的实际分布地区较符合,说明基于遥感和GIS技术提取猪苓资源的适宜性分布区域是可行的。

Study on suitable distribution areas of Grifola umbellate in Sichuan province based on remote sensing and GIS

Grifola umbellate is the important medicinal materials in China which has a very high medicinal value. This study analyzedthe suitable distribution areasof G. umbellate and provided scientific basis for determining G. umbellate planting regions and planning production distribution reasonably. The suitable distribution areas of G. umbellate in Sichuan province was researched based on TM, ETM+, and DEM data,the key ecological factors that affect the growth of G. umbellate were extracted, including elevation, slope, aspect, average annual temperature,average annual precipitation,forest information,soil information, following remote sensing and GIS techniques, combining field researchdata. The results showed that the G. umbellate resources in Sichuan province were mainly distributed in Pingwu, Beichuan, Licountry, Yanyuan, Xichang, Dechang, Yanbian, Miyi, Huidong, Panzhihua and so on, the suitability distribution areas is 276.214 4 km² approximately and accounting for more than 0.143 3% of the total area.According to the related document information and the field investigation, showed that the suitability distribution based on RS and GIS were corresponded with the actual distribution areas of G. umbellate.